题目内容
解方程:5x+6(3x+2)(-2+3x)-54(x-
)•(x+
)=2.______
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5x+6(3x+2)(3x-2)-54(x-
)•(x+
)=2,
5x+6(9x2-4)-54(x2-
)=2,
5x=20,
x=4.
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5x+6(9x2-4)-54(x2-
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5x=20,
x=4.
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